cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ashrdi3.c (535B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/module.h>
      3
      4#include "libgcc.h"
      5
      6long long __ashrdi3(long long u, word_type b)
      7{
      8	DWunion uu, w;
      9	word_type bm;
     10
     11	if (b == 0)
     12		return u;
     13
     14	uu.ll = u;
     15	bm = 32 - b;
     16
     17	if (bm <= 0) {
     18		/* w.s.high = 1..1 or 0..0 */
     19		w.s.high =
     20		    uu.s.high >> 31;
     21		w.s.low = uu.s.high >> -bm;
     22	} else {
     23		const unsigned int carries = (unsigned int) uu.s.high << bm;
     24
     25		w.s.high = uu.s.high >> b;
     26		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
     27	}
     28
     29	return w.ll;
     30}
     31
     32EXPORT_SYMBOL(__ashrdi3);